Captain Bill Ranson
Jeffrey Hunter
Rolande Hertog
Annemarie Düringer
Piet van Wijt
Philip Bond
Mr. Hendrijk
Otto Diamant
Mrs. Hendrijk
Marianne Walla
Mary Ann Lennig
Beth Rogan
Jan Guldt
Arthur Gross
Brauner, shot spy
Wolf Frees
Major Julien Howard
Nigel Patrick
Dr. Mulder
David Kossoff
Hans Faber, chief spy
Rolf Lefebvre
Martins, building porter-spy
Larry Burns
Anthony Ostrer
Willem Mulder
Claude Kingston
Lt. Miller
Robert Raglan
Sgt. Bill Parrish
Peter Prouse
Director
Victor Vicas
Novel
Barry Wynne
Writer
Jack Seddon
David Pursall